Stumper

n.	1.	One who stumps.
	2.	A boastful person.
	3.	A puzzling or incredible story.

Noun

1.

stumper - a particularly difficult or baffling question or problem Synonyms: toughie, poser, sticker

Chinese puzzle, baffling problem, brain twister, campaigner, crossword puzzle, crux, electioneer, enigma, enigmatic question, floorer, jigsaw puzzle, knot, knotty point, mind-boggler, mystery, nut to crack, perplexed question, perplexity, poser, problem, puzzle, puzzlement, puzzler, question, question mark, sixty-four dollar question, sticker, stump orator, stump speaker, tough proposition, vexed question, whistle-stopper, why